In-situ synthesis and characterization of silver nanoparticle decorated cotton knitted fabric for antibacterial activity and improved dyeing performance

Abstract

This study reports the antimicrobial activity and improved dyeing performance of cotton knitted fabric by depositing silver nanoparticles on the surface. The cotton fabric is first treated with caustic soda (NaOH) of three different concentrations to activate the hydroxyl groups on the cellulose surface and then the nanoparticles are introduced on fabric surface by direct reduction of silver nitrate salt using ascorbic acid. The presence of silver nanoparticles on the fabric surface is clearly observed by scanning electron micrograph. The elementary analysis is done by energy dispersive spectroscopy and the chemical interaction of cotton fibre with nano silver is characterized by Fourier transform infrared spectrum. In this work, the antimicrobial activity on Ag deposited sample is investigated by quantitative analysis against both Gram positive (S. aureus) and Gram negative (E. coli) bacteria. Results shows a significant antimicrobial activity such as more than 90% bacterial reduction of both Gram positive and Gram negative bacteria are inhibited. The fabric sample is dyed with 2% direct dye and consequently the result shows very good performance in dye exhaustion, colour strength and fastness property. For instance, the incorporation of Ag nanoparticles increases 7% of dyestuff exhaustion and 15% of colour strength of the fabric. However, Ag nanoparticles deposited fabric loses its strength slightly due to the pretreatment using NaOH for the functionalization of cotton.

TEXTILE FINISHING WITH CHITOSAN AND SILVER NANOPARTICLES AGAINST Escherichia coli ATCC 8739

“…EDX analysis was performed to observe the elemental distributions on the surface of cotton fabrics coated with chitosan and nano-Ag particles and to detect the presence of nano-Ag particles on the fabric surface. Previous studies reported that 3 keV peaks attributed to the Ag formation signal were observed in the EDX analysis graph of the nano-Ag deposited fabric (Gharibshahi et al 2017, Tania et al 2019. In this study, the presence of the peak of the Ag element in the EDX spectrum of cotton fabrics confirmed the deposition of silver nanoparticles on the fabric.…”

Development of antibacterial and UV protective cotton fabrics using plant food waste and alien invasive plant extracts as reducing agents for the in-situ synthesis of silver nanoparticles

“…In many studied approaches to green in-situ AgNP phytosynthesis, the aggressive chemicals were used to prepare plant extracts, e.g. in methanol, ethanol and hexane as solvents, or in the presence of sodium hydroxide or acetic acid, and therefore cannot be considered as fully green synthesis processes (Rehan et al 2020;Yu et al 2020;Logeswari et al 2015;Velmurugan et al 2017;Tania et al 2018). However, there are some studies in which only silver precursors and plant water extracts (i.e.…”

In-situ Deposition of Ag Nanoparticles on Dopamine Pre-Modified Cotton Fabric and Analysis of Its Functional Mechanical and Dyeing Properties

“…Figure 3 (a) shows the untreated fabric where no Ag nanoparticle exists. It can be noted that this method shows more deposition of Ag nanoparticles than that of other in-situ deposition methods of our previous work [12,22]. By initial observation, SEM image proves the successful immobilization of Ag nanoparticles into the cotton fabric surface.…”

“…Different ways are available to modify the textile surface for better performance of nanoparticle deposition. Fiber modi cation in the case of in-situ nano deposition also offers a greater opportunity for instant xation [12]. In this research, the fabric is modi ed chemically by using dopamine hydrochloride.…”